A novel approach for predicting the lifetime of corroded reinforced concrete structures

This paper presents a numerical modeling approach for estimating the remaining service lifetime of reinforced concrete (R.C) structures under varying levels of steel corrosion, adhering to ACI 318 standards. The methodology considers corrosion-induced modifications in steel cross-section, material properties, and bond strength. By analyzing a corroded R.C beam using ABAQUS software, deflection at design load intervals (10, 20, 30, and 40 years post-corrosion initiation) is assessed. Correlating deflection with time enables estimation of the critical time when the beam reaches maximum allowable deflection. The validity of the proposed numerical approach is verified through experimental data obtained from corroded R.C beam specimen tested in flexure. This research contributes to understanding the structural behavior of corroded R.C structures, facilitating proactive maintenance strategies for buildings sustainability.